/ 10
struct Student {
int id;
int score;
};

int main() {
Student students[3] = {
{1, 90},
{2, 80},
{3, 100}
};

int sum = 0;
for (int i = 0; i < 3; i++) {
sum += students[i].score;
}
double average = sum / 3.0;
cout << average << endl;
return 0;
}